How use ModelObject->save($entityObject) well?

In BaseModel ,This function is not a good idea. for resolved insert and update. 

PHP Code:

protected function doProtectFields(array $data): array
    {
        if (! $this->protectFields) {
            return $data;
        }

        if (empty($this->allowedFields)) {
            throw DataException::forInvalidAllowedFields(static::class);
        }

        foreach (array_keys($data) as $key) {
            if (! in_array($key, $this->allowedFields, true)) {
                unset($data[$key]);
            }
        }

        return $data;
    }